H2SO4 to reduce PH
H2SO4 to reduce PH
(OP)
Hello,
1) In a surface water treatment plant we use H2SO4 to reduce PH (from 8.5 to 7.4-7.5) before coagulation with alum. Can you suggest any papers/work related with H2SO4 dosing & results for PH reduction (best coagulation).
2)Afterwards, we use Ca(OH)2 to increase PH. I need to know the relation among conductivity/lime saturation/ph in order to calculate the dose.
Thank's
1) In a surface water treatment plant we use H2SO4 to reduce PH (from 8.5 to 7.4-7.5) before coagulation with alum. Can you suggest any papers/work related with H2SO4 dosing & results for PH reduction (best coagulation).
2)Afterwards, we use Ca(OH)2 to increase PH. I need to know the relation among conductivity/lime saturation/ph in order to calculate the dose.
Thank's





RE: H2SO4 to reduce PH
To adjust the pH, you need to know the alkalinity of the water.
1 mg/l of 98% Sulfuric Acid will reduce the alkalinity by 1 mg/l.
1 mg/l of hydrated lime will increase the alkalinity by 1.26 mg/l
Check out Water Supply and Pollution Control by Viessman and Hammer for further information.
RE: H2SO4 to reduce PH